PURPOSE:To obtain a thin, long-life electronic timepiece by making a power source electrode of hermetic structure eccentric from the center position of a power source body. CONSTITUTION:The minus electrode 1 of a battery 2 is made eccentric from the center of the battery body and then connected to a minus terminal 5 without contacting the center wheel 6 of the timepiece 8. Therefore, the outward appearance of the battery 2 is allowed fully to the plane size of the timepiece 8 and sufficient battery capacity is securely. Further, the flange part 2-a of the battery 2 is pressed by the hood part 11-a of a circuit pressure plate 11 to fix the battery 2 to the timepiece 8. Then, a hermetic sealing part for leading out the electrode 1 is pressed in a hole bored in the pressure plate 11 to prevent the battery 2 from rotating. Thus, the hermetic sealing part is extended in a plane from the center wheel 6 to an hour wheel 7 to prevent the timepiece 8 from becoming thicker, thereby obtaining the thin, long-life electronic timepiece.